The Czech model looked stunning in a short-sleeved knee-length pink dress with cream colored heels and a matching clutch while her fellow model of the American variety looked adorable in a shiny short-sleeved top and knee-length royal blue skirt with open-toed heels. Also on hand to celebrate was Owen Wilson, Summer Rayne Oakes, Isabeli Fontana, and Elisa Sednaoui.

Beginning in 1964, the calendar was started as a racy way to promote the brand's tires, but this year, the models will all be clothed. Photographer Steve McCurry explained his vision, saying, "I thought 'why don't we find models who aren't only gorgeous and beautiful but are also doing good things.'"

In awe of her company, Petra tweeted on Tuesday, "With such amazing and inspirational women at the #PirelliCalendar Launch Gala!"